Pressing

General principle

Pressing is used to form and densify the ceramic by compressing it in the form of a paste in mould in the shape of the item to be manufactured.

Detailed description

There are three types of pressing:

Uniaxial pressing (forging): Forging operation that involves plastic deformation using matrices after raising the temperature of the parts (pressure = 2,300 kN).

 

Dry bag isostatic pressing: Radial pressing through a flexible membrane (pressure = 2,000 bars).

Wet bag isostatic pressing: Multidirectional pressing through a flexible membrane (pressure = 3,100 bars).

 

Materials involved

Very high purity alumina
Zirconia
Ruby
Sapphire
Controlled porosity ceramics

Advantages and disadvantages of this process

Avantages
  • High output (forging, dry bag)
  • Simply forming
Inconvénients
  • Low output (wet bag)
Raw material
Finished product

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